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            _____              __   __   _    _   
  ____     |  ___||   ____     \ \\/ // | |  | || 
 |    \\   | ||__    |    \\    \ ` //  | |/\| || 
 | [] ||   | ||__    | [] ||     | ||   |  /\  || 
 |  __//   |_____||  |  __//     |_||   |_// \_|| 
 |_|`-`    `-----`   |_|`-`      `-`'   `-`   `-` 
 `-`                 `-`

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Text this: Exploring the use of signals of opportunity for practical localization